Improved glass caster-wheel



J. B. OAPEWELL.

GLASS OASTER WHEEL. 5 No. 50,795. Patented Nov. 7, 1865.

UNITED STATES PATENT OFFICE.

JOHN B. CAPEWELL, OF GLOUCESTER, NEW JERSEY.

IMPROVED GLASS CASTER-WHEEL-I Specification forming part of Letters Patent No. 50,795, dated November 7, 1865.

-a side View ot' the ribbed bush employed in `the construction of' the glass caster-wheel.

Lilie letters designate corresponding parts vin both figures.

Casters with glass wheels are desirable for bedsteads, sofas, lounges, and other articles ot furniture of a similar character, because ot' the insulation of the article thereby, thus not only securing; the occupants from lightning, but conduclng to the health ot"in\'a-}id`s. They are also especially valuable for piano brtes'and other movable musical instruments intended. to stand upon carpeted tloors, because from the exceeding elasticity and sonorousness of glass the tones of the instruments are thus rendered. much fuller and clearer; but there is much difficulty in .the adaptation of'iglass to this purpose. The glass wheels, if they have I no metallic bushing, will soon crumble and break to pieces, and au ordinary bush of metal very soon works loose in the glass, and hence the same result lfollows as wit-hout, though not quite so soon, since the bearing is thereby somewhat enlarged,

My improvement consists in employing a bush ot' metal', yprovided with longitudinal ribs.

projecting from its peripheral surface, around which the glass fits, so that there is no possibllity of the bnshs turning or working l'oose in the glass, and by thus enlarging,` the bear ings the glass is found sufficiently strong and firm to resist abrasion and crumblinnz In the accompanying drawings, the metallic bush C is shown with'its wedge-shaped ribs a a a a, of any convenient number, 'titting .into

similar-shaped notches in the glass wheel A. AThe bush turns on`the pivot-pin B, thus Are` le'ving the glass of direct contact therewith.

In constructing4 thesel caster wheels the bushes are first prepared, and the glass, when melted, is pressed around them in molds, so that when cold the wheels tit tightly nponthe y bushes. The bushes may have rivet-likeheads on their ends, it' desired.

What I claim as my invention; and desire` to secure by Letteis Patent, is-

The employment of glass wheels with ribbed bushes for casters, substantially as and for the purposes herein specified.

,JOHN B. OAPEWELL. Witnesses:

FRANCIS D. PAs'roEIUs, W. W. DOUGHEETY. 

